package com.example.week12_networkprogramming;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

/**
 * Created by Administrator on 2022/5/16.
 */

public class GetPostUtil {
    public static String sendGet(String url,String params)
    {
        String result="";
        BufferedReader in=null;
        try
        {
            String urlName=url+"?"+params;
            URL realUrl=new URL(urlName);
            URLConnection conn=realUrl.openConnection();
            conn.setRequestProperty("accept","*/*");
            conn.setRequestProperty("connection","Keep-Alive");
            conn.setRequestProperty("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT5.1;SV1)");
            conn.connect();
            Map<String,List<String>> map= conn.getHeaderFields();
            for(String key:map.keySet())
            {
                System.out.println(key+"--->"+map.get(key));
            }
            in=new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line=in.readLine())!=null)
            {
                result+="\n"+line;
            }

        }catch (Exception e)
        {
            e.printStackTrace();
        }
        finally {
            try {
                if(in!=null)
                {
                    in.close();
                }
            }catch (Exception e)
            {
                e.printStackTrace();
            }
        }
        return result;
    }

    public static String sendPost(String url,String params)
    {
        PrintWriter out=null;
        BufferedReader in=null;
        String result="";

        try {
            URL realUrl=new URL(url);
            URLConnection conn=realUrl.openConnection();

            conn.setRequestProperty("accept","*/*");
            conn.setRequestProperty("connection","Keep-Alive");
            conn.setRequestProperty("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT5.1;SV1)");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out=new PrintWriter(conn.getOutputStream());
            out.print(params);
            out.flush();
            in=new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while((line=in.readLine())!=null)
            {
                result+="\n"+line;
            }
        }catch (Exception e)
        {
            System.out.println("发送POST请求出现异常！"+e);
            e.printStackTrace();
        }
        finally {
            try {
                if(out!=null)
                {
                    out.close();
                }
                if(in!=null)
                {
                    in.close();
                }
            }catch (Exception ex)
            {
                ex.printStackTrace();
            }
        }
        return result;
    }


}
